Method for computing a compensation value for an engine having e

Details Method for computing a compensation value for an engine having e Method for computing a compensation value for an engine having e

1981-11-30

1983-11-08

Cox, Ronald B.

Internal-combustion engines

Charge forming device

Fuel injection system

123486, 123465, 123440, F02B 300, F02B 3300

Patent

active

044136013

ABSTRACT:
A compensation value computing method for an electronic fuel injection controlled engine according to this invention measures an operating parameter for detecting the idling, low-load and high-load running conditions of the engine. First, second and third memory locations are provided corresponding, respectively, to these running conditions of the engine to compute feedback air-fuel ratios on the basis of feedback signals from an air-fuel ratio sensor. Values in the memory are compensated corresponding to the detected running conditions of the engine on the basis of the deviation of a feedback air-fuel ratio from the base air-fuel ratio. When the values in at least two memory locations differ from the base value by not less than a predetermined value, the altimetric compensation value is adjusted and when the difference between values in the first and third memories is larger than that between values in the second and third memories, the output compensation value of an air flow meter for detecting intake air flow is adjusted.

REFERENCES:
patent: 4130095 (1978-12-01), Bowler
patent: 4201161 (1980-05-01), Sasayama
patent: 4235204 (1980-11-01), Rice
patent: 4306529 (1981-12-01), Chiesa
patent: 4307696 (1981-12-01), Noji
patent: 4309971 (1982-01-01), Chiesa

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